package com.zhu.util;

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Date;

/**
 * 时间戳转换API
 * LocalDate LocalTime   LocalDataTime  新API
 * 原来用法 SimpleDateFormat  format方法 时间戳 传递格式
 * format方法存在线程安全问题  多线程实现同一个资源 存在临时变量
 */
public class DataFormatUtil {

    //年月日格式
    private static final DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy-MM-dd");
    private static final DateTimeFormatter dtfFull = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");


    public static Long toTs(String dtStr, boolean isFull) {
        LocalDateTime localDateTime = null;
        if (!isFull) {
            dtStr = dtStr + " 00:00:00";
        }
        localDateTime = LocalDateTime.parse(dtStr, dtfFull);
        return localDateTime.toInstant(ZoneOffset.of("+8")).toEpochMilli();
    }
    public static Long toTs(String dtStr) {
        return toTs(dtStr, false);
    }
    public static String toDate(Long ts) {
        Date dt = new Date(ts);
        LocalDateTime localDateTime =
                LocalDateTime.ofInstant(dt.toInstant(), ZoneId.systemDefault());
        return dtf.format(localDateTime);
    }
    public static String toYmdHms(Long ts) {
        Date dt = new Date(ts);
        LocalDateTime localDateTime =
                LocalDateTime.ofInstant(dt.toInstant(), ZoneId.systemDefault());
        return dtfFull.format(localDateTime);
    }
}

